How would you make an edge circle around a cone?
I'm sure it must be difficult to be unable to do traditional art after having done it for so long. :-/ Great that you're learning 3D though!

Edge looping cones is a bit tricky. The easiest method that I know of is to do this:


Select the bottom edge
Ctrl + B to bevel the bottom edge
Select the higher of the two bottom edges, and hit G twice to enter edge slide mode. Slide into place.


Here's an image to help.



Honestly, I would recommend sliding your first edge loop all the way to the top, then deleting everything above it--so that the very top of your cone is actually a tiny edge ring. You can then use F to fill it to cap it off. This'll make it so that you can use the regular edge loop tool to create edge loops in the future.

Best of luck!